Boiler



Aug. 5, 1941.

E. L, HANNUM ET AL BOILERy Filed Nov. 27, 1959 5 SheetsQSheet 2 E. l.. HANNUM ET Ap.

BOILER Aug. 5, 1941. Y

eef?? E. L. HANNUM ETAL BOILER Filed NOV. 27, 1959 5 sheets-sheet 4 Aug. 5, 1941. E. L. HANNUM ETAL 2,251,589

BOILER Filed Nov. 27, 1959 5 Sheets-Sheet 5 l??? lilyn u n l l l i l n n Q Patented Aug. 5, 1941 nomia .Edwin L. Hannurn, Westfield, Mass., Lauren E.

Seeley, New Haven, Conn., and EdgarA C. Desjardins, Westfield',1lVIass., assignors to The H.

' B'. Smith Company; Incorporated, Westeld,

Mass., a corporation of Massachusetts Application November 27, 1939, ySerial No. 306,280

9 Claims.

This invention relates to an improvement in a boiler and has as its primary object around boiler comprising two sections joined along a central Vertical plane extending from front to back thereof.

Further objects of this invention'reside in the provision of a water backed crown sheet overhanging the combustion chamber and made up of two separate sections betweenwhich'the combustion gases pass from the combustion chamber to the llues through passages dened by registering iins projecting outwardly from the adjacent surfaces of the crown sheet sections, and a ue passage from the combustion chamber, of a baille by which the normal flow of combustion gases through said flue passage from the chamber to the flue is regulated in accordance with the draft conditions of the boiler, and the proportional distribution of the gases through other passages is secured, of a plurality of nipples by which circulation between the 4water chambers of the boiler sections is maintained, and of other features which will be more specifically set forth and claimed hereinbelow. r

These objects will appear from an examinament of this invention and of the accompanying drawings in which such embodiment is illustrated and in which Y Fig. 1 is a perspective View of a complete boiler k Fig; 3 is a side elevation of the boiler shown in Fig. 2;

Figs. 4 and 5 are rear. elevation and plan views, respectively, of such boiler;

Fig. 6 is a view of the boiler in the process of being set up, the two sections being shown separated;

Figs. '7, 8, 9, 10 and 11 are horizontal sectional views taken along such section lines on Fig. 3;

Fig. 12 is a vertical section taken along the line l2-l2 of Fig. 3;

Fig. 13 is an elevational View of the upper portion of one section of the boiler;

Fig. 14 is a view similar to Fig. 11v differing therefrom in certain respects; and

Figs. 15 and 16 are illustrations of two forms of baille plates which might be employed.

` The boiler is particularly adapted'for use with an oil burner and includes the usual elements, as, for example, a lire pot 2l, combustion chamber 22, observation opening 23' and door 24,

.25 tion of the following description of one embodi .Zontal flue 4I. the bottom of theboiler by legs 42 to dene a :bottom horizontal flue 43 connected to the flue burner opening 25 and door 26, clean-out opening 21 and cover 28, flue outlet 29 and stack 30.

The boiler comprises two sections 3| and 32 adapted to be joined in a vertical central plane extending from front to back. The abutting edges are provided with the necessary recesses which, when the boiler is assembled, register to provide the openings 23, 25 and 2'! and the outlet 29. vT'hese edges are sealed by the provision on the edge of the section 3l of a pair of parallel beads 33 and on the edge of the section 32 a bead 34 which enters the space between the beads 33 in which a suitable cement has been placed in the usual way.

The nre-box 2l and combustion chamber 22 are substantially surrounded by water spaces formed inthe sections 3| and 32. Each section is provided with a .horizontal water space 35 below the fire pot, a semi-cylindrical water leg 35, and a second horizontal water space 31 enclosing the dome of the combustion chamber. In addition each section is also provided with a water leg 38 at the back of the re pot and a water backed crown sheet section 39 which projects into the combustion chamber.

As shown in the drawings the water leg 38 and crown sheet section 39 coact to dene and Iseparate from the fire pot and combustion chamber a down draft flue 411 and an upper hori- The re pot 2| is spaced from 40 by a passage 44 below the water legs 38.

The surfaces of the water legs 38 abut when the sectionsA are `assembled and, being provided with beads and 46 similar to the beads 33 and 34, are sealed so that no gases can pass therebetween. The surfaces of the crown sheet sections 39k are, however, spaced apart when the sections are vassembled to provide a Vertical passage i'l between the combustion chamber 22 and the ues 40 and 4I. Fins 43 on these surfaces project into this passage 41 and are in register to define a plurality of separate passageways 49.

The ns thus serve to increase the efficiency of the boiler by combingtheheat from the fuel not only by the provision of these passageways but also by absorbingv the heat and transferring it to the water in the crown Sheet sections. It will be noted that these passageways vary in dimensions particularly in length and depth and that they taper outwardly being larger at the exit ends.

A fusible plug 52 may be inserted in one of the crown sheet sections as a safety device. Supported on the upper fins of the sections 39 is a holder plate 53 which carries a baille 54. The holder plate 53 is so formed that the baille 54 can project horizontally directly into the vertical path of the gases or vertically into the upper horizontal flue lil (see Fig. 13). lIhe setting of the baille is determined by the draft set up in the particular installation, being vertical on average chimneys and horizontal on poor chimneys. The baille 54 may be solid, as shown in Fig. 15. In place thereof the baille 55, having its outer edge interrupted by notches 56, may be-substituted (see Fig. 16).

Under some conditionsl the baille may be omitted or a damper, valve or other similar means may be employed. This feature facilitates a variance of the draft loss depending upon the particular conditions present at each installation. It will be noted that this regulation of the passage through the ilue 4| also acts to secure a proportional distribution through the various draft passages from the combustion chamber.

When the sections 3| and 32 are assembled, the water spaces therein are connected by nipples 60, 6| and 62. A tap 63 on the top of the section 32 serves the supply mains and risers to the radiators (not shown). section are usually used for accessories such as safety valves or as optional locations for thermometer, aquastat, etc., -but might be used for small diameter (l1/2" or less) steam or hot water lines to the radiators. The return flow enters the spaces through either or both taps 66, if only one tap be used, the other being plugged in the usual way.

I-Iot water coils 'lil may be introduced into the water spaces either through the taps (Figs. 3, 4 and 11) or through one of the taps '|2 (Fig. 14). In the second instance the coils pass through the nipple 60 and the tap 'l2 not used is plugged. In conjunction with the coils lil an aquastat 13 may be seated in one of the taps 'll or '|2 and a reverse action aquastat seated in one of the taps 15. As pointed out above, the taps not used will be plugged.

The sections 3|, 32 are secured in position by a plurality of bolts 30 passed through ears 8|. At the front of the boiler may be provided a water gauge 82 and a steam gauge 83.

The re pot 2| includes base sections 85 and 86, side lining plates 81, back lining plate 83 and front lining plate 88a. The base sections and lining plates may be positioned before or after the sections 3| and 32. Fig. 6 shows the base sections 85 and 86 and the side lining plates 88 positioned before the sections' 3| and 32 are assembled, the front and rear lining plates being positioned after the sections are assembled. Usually, however, the opening 25 is of such size that the base sectionsv and lining plates of the fire-box can be positioned after the sections 3| and 32 are assembled. In the outer faces of the plates 8l are formed channels 83 which lead into the bottom horizontal flue 43. Some of the gases are thus carried down the sides and around the bottom of the iire pot, thereby quickly heating and increasing the efficiency thereof.

While one embodiment of this invention is adapted for use with an oil burner, it will be understood that the invention is not limited thereto and that other embodiments thereof adapted for use with oil or other fuel may be made without departing from the spirit and scope of the invention as set forth in the follOW- ing claims.

The taps 64 on said CTI We claim:

1. A boiler having a fire pot, a combustion chamber, a stack, a down draft ue, a horizontal flue, said down draft flue leading to said stack and said horizontal ue leading from said combustion chamber to said down draft flue whereby said flues connect said combustion chamber with said stack and a plurality of connected water spaces, said spaces including a water leg between said re pot and said down draft flue, and a water backed crown sheet which projects into said combustion chamber and separates said chamber from said down draft and horizontal ues.

2. A boiler having a fire pot, a combustion chamber, a stack, a down draft flue, a horizontal flue, said down draft flue leading to said stack and said horizontal flue leading from said combustion chamber to said down draft flue whereby said fiues connect said combustion chamber with said stack and a plurality of connected water spaces, said spaces including a water leg between said fire pot and said down draft flue, a water backed crown sheet which projects into said combustion chamber and separates said chamber from said down draft and horizontal flues, and means for varying the draft conditions at the horizontal flue.

3. A boiler having a fire pot, a combustion chamber, a stack, a down draft flue, a horizontal flue, said fiues connecting said combustion chamber with said stack and a plurality of connected water spaces, said spaces including a water leg between said fire pot and said down draft ue, water backed crown sheets between said combustion chamber and said down draft and horizontal ilues, and a plurality of passageways between said crown sheets through which gases may escape from said combustion chamber into said down draft flue.

4. A boiler having a fire pot, a combustion chamber, a stack, a down draft flue, a horizontal flue, said flues connecting said combustion chamber with said stack and a plurality of connected water spaces, said spaces including a water leg between said fire pot and said down draft iiue, and a water backed crown sheet between said combustion chamber and said down draft and horizontal flues, said crown sheet being in two sections spaced apart vertically to provide passages through which gases may escape from said combustion chamber into said down draft and horizontal flues.

5. A boiler having a fire pot, a combustion chamber, a stack, a down draft flue, a horizontal flue, said ilues connecting said combustion chamber with saidv stack and a plurality of connected water spaces, said spaces including a water leg between said fire pot and said down draft flue, and a water backed crown sheet between said combustion chamber and said down draft and horizontal ilues, said crown sheet being in two sections spaced apart vertically to provide passages through which gases rnay escape from said combustion chamber into said down draft and horizontal iiues, and fins on the adjacent surfaces of the crown sheet sections which form said passages, which iins register to define a plurality of separate passageways.

6. A boiler having a lire pot, a combustion chamber, a stack, a down draft flue, a horizontal flue, said ilues connecting said combustion chamber with said stack and a plurality of connected water spaces, said spaces including a water leg between said fire potand said down draft flue,

and a water backed crown sheet between said combustion chamber and said down draft and horizontal flues, said crown sheet being in two sections spaced apart vertically to provide passages through which gases may escape from said combustion chamber into said down draft and horizontal flues, and fins on the adjacent surfaces of the crown sheet sections which form said passages, which fins register to deiine a plurality of separate passageways, and a baille carried by said crown sheet and projecting into the stream of gases flowing from the combustion chamber past the end of the crown sheet and through the horizontal iiue.

7. A boiler having a fire pot, a combustion chamber, a stack, a down draft flue, a horizontal flue, said iiues connecting said combustion charnber with said stack and a plurality of connected water spaces, said spaces including a water leg between said fire pot and said down draft flue, and a water backed crown sheet between said combustion chamber and said down draft and horizontal iiues, said crown sheet being in two sections spaced apart vertically .to provide passages through which gases may escape from said combustion chamber into said down draft and horizontal flues, and fins on the adjacent surfaces of the crown sheet sections which form said passages, which ns register to define a plurality of separate passageways, and a baille carried by said crown sheet and projecting into the stream of gases flowing from the combustion chamber past the end of the crown sheet and through the horizontal flue, said baifle extending horizontally into the path of the gases past the end of the crown sheet.

8. A boiler having a fire pot, a combustion chamber, a stack, a down draft flue, a horizontal flue, said flues connecting said combustion chamber with said stack and a plurality of connected water spaces, said spaces including a water leg between said fire pot and said down draft flue, and a Water backed crown sheet between said combustion chamber and said down draft and horizontal ilues, said crown sheet being in two sections spaced apart vertically to provide passages through which gases may escape from said combuston chamber into said down draft and horizontal flues, and fins on the adjacent surfaces of the crown sheet sections which form said passages, which ns register to define a plurality of separate passageways, and a baile carried by said crown sheet and projecting into the stream of gases flowing from the combustion chamber past the end of the crown sheet and through the horizontal flue, said baffle extending vertically into the horizontal flue into the path of the gases as they round the end of the crown sheet.

9. A boiler having a fire pot, a combustion chamber, a stack, a down draft ue, a horizontal flue, said flues connecting said combustion chamber with said stack and a plurality of connected water spaces, said spaces including a water leg between said fire pot and said down draft flue, and a water backed crown sheet between said combustion chamber and said down draft and horizontal flues, said crown sheet being in two sections spaced apart vertically to provide passages through which gases may escape from said combustion chamber into said down draft and horizontal ilues, and ns on the adjacent surfaces of the crown sheet sections which form said passages, which fins register to define a plurality of separate passageways, and means in said horizontal flue for Varying the ilow of gases therethrough and thereby proportionately distributing the flow of gases through the various passages.

EDWIN L. HANNUM. LAUREN E. SEELEY. EDGAR C. DESJARDINS. 

